Desulphurization method of amine liquid with high removal rate of hydrogen sulfide and special equipment

A desulfurization device, hydrogen sulfide technology, applied in the direction of hydrogen sulfide, chemical instruments and methods, separation methods, etc., can solve the problems of high energy consumption, large steam consumption, low hydrogen sulfide removal rate, etc., and achieve high removal rate , good absorption effect, saving reboiler steam effect

Active Publication Date: 2008-10-01
ZHENHAI PETROCHEMICAL ENG CO LTD
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  • Claims
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Problems solved by technology

[0003] In the actual use process, the content of hydrogen sulfide in the finally purified gas of this process is still very high, reaching more than 400ppmv, that is, the removal rate of hydrogen sulfide is lo

Method used

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  • Desulphurization method of amine liquid with high removal rate of hydrogen sulfide and special equipment
  • Desulphurization method of amine liquid with high removal rate of hydrogen sulfide and special equipment
  • Desulphurization method of amine liquid with high removal rate of hydrogen sulfide and special equipment

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Embodiment

[0020] Embodiment: Referring to Fig. 1, the amine liquid desulfurization device in this embodiment mainly includes an absorption tower 1, a regeneration tower 2, a first heat exchanger 51, a second heat exchanger 52, a first pump 61, a second Pump 62, the third pump 63, the first air condenser 71, the second air condenser 72, the third air condenser 73 and the first pipeline 91, the second pipeline 92, the third pipe for connecting the above-mentioned equipment Road 93 and fourth pipeline 94, the regeneration tower 2 is divided into an upper section and a lower section, and the absorption tower 1 has a bottom outlet, a middle inlet and an upper inlet.

[0021] One end of the first pipeline 91 is connected to the outlet at the bottom of the absorption tower 1, and the other end is connected to the inlet of the upper section of the regeneration tower 2. The first pump 61 is installed in series on the first pipeline 91. The heated inlet and heated outlet of the first heat exchange...

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Abstract

The invention discloses an amine liquid desulphurization method with high hydrogen sulphide removal rate and a special device. A regeneration tower is divided into an upper section and a lower section; by a third pipeline which is provided with a third pump and is added between the middle part of an absorption tower and the outlet of the upper section of the regeneration tower, and a fourth pipeline by which the outlet of the regeneration third pump and the inlet of the lower section of the regeneration tower are communicated with each other, two-step absorption and two-step regeneration are carried out by using solvents with different hydrogen sulphide contents, a small part of solvent with little hydrogen sulphide is used as absorbent of final-step, therefore, the solvent quantity which achieves the low content of hydrogen sulphide is little, thus the steam dosage is reduced, the reboiler steam is saved by about 30 percent, the operation energy consumption is greatly reduced and the desulphurization expense is reduced further; meanwhile, the content of the hydrogen sulphide in the processing gas purified by the invention can achieve less than 50ppmv; therefore, the absorption effect is good and the hydrogen sulphide removal rate is high.

Description

technical field [0001] The invention relates to an amine liquid desulfurization method, in particular to an amine liquid desulfurization method with a high hydrogen sulfide removal rate, and also relates to a special device for the amine liquid desulfurization method. Background technique [0002] At present, the technology of removing hydrogen sulfide contained in process gas by using amine liquid absorption method is widely used in desulfurization devices of petrochemical enterprises. The acid gas reacts to generate the corresponding amine salt, so that the process gas is purified; at the same time, the generated amine salt is easy to decompose at a higher temperature, so that the amine liquid can be regenerated and recycled. The existing amine liquid desulfurization method adopts one-stage absorption and one-stage regeneration process, and its device flow is shown in Figure 2. The process gas containing hydrogen sulfide enters from the bottom of the absorption tower 1a, a...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/52C01B17/16
Inventor 陈奎范晓梅朱元彪钱志海吴国勤杨相益
Owner ZHENHAI PETROCHEMICAL ENG CO LTD
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